Two of the spinoffs from the Flintstones modified that line. "The Flintstones Comedy Hour/Show" proclaimed "We'll have a groovy time" (this was early-1970s), while "The New Fred and Barney Show" sang "We'll have a great old time".
The Late Late Show with Craig Ferguson mentioned this in a Funny Moment. "Well, back then, 'gay' meant fun. Not like now, when it means 'really fun.'"
In an episode of Drawn Together, the cast drives by a devastated Bedrock, and Princess Clara snidely comments "well that's what they get for having a gay old time."
Given that Mr. Krabs of SpongeBob SquarePants' entire manner of speech is intentionally archaic, this trope's pretty in-line with his character. The episode "The Lost Mattress" has Mr. Krabs use "queer" in its "strange, unusual" meaning. The episode "The Krusty Sponge" has Mr. Krabs refer to a little boy as a girl. "Girl" once used to mean a little kid, regardless of gender.
In one episode of Adventures of Sonic the Hedgehog upon hearing that an island was full of "booby traps", Grounder responds with "Booby traps? What does he think we are, boobs?"
Some old Looney Tunes shorts have titles that make you look twice nowadays:
"Puss 'N' Booty" (1943)
"Angel Puss" (1944)
"Bone, Sweet Bone" (1948)
"Boobs in the Woods" (1948)
"Easter Yeggs" had Bugs encountering a weeping Easter Bunny who explains to him that his job delivering Easter eggs has made his feet sore and thus is unable to continue the job unless another rabbit does it for him (unbeknown to him, the Easter Bunny tricks other rabbits by guilt tripping them to doing the job for him while he doesn't have to do anything). During his sob story, he briefly mentions himself being "happy and gay" before hurting his feet. This can be taken both ways.
The Bugs Bunny cartoon "Bunny Hugged" features The Crusher, a huge beast of a wrestler, and his seriously mismatched opponent, a parody of real-life 'sissy' wrestler Gorgeous George, announced as "Ravishing Ronno - the Gay Nature Boy". Again, can be taken both ways.
Daffy Duck: [to second Daffy] Listen bud, If you wasn't me, I'd smack you right in the puss.
Several old Tom and Jerry shorts have "Puss" or "Pussy" in the title. In one, Spike the bulldog threatened Tom with "I'll poke you in the puss!"
Puss has always meant face though. PussY on the other hand...
A 1960 Woody Woodpecker short is titled Billion Dollar Boner ("boner" being outdated slang for a screwup or a mistake).
And for crying out loud, the name Woody.
Lampshaded in a T-shirt making the rounds at shops. It's a picture of a circa-1947 Woody in a bathrobe and slippers looking groggy, as if he had just woken up. The caption reads "Morning Woody."
... and "pecker"....
Another Walter Lantz cartoon features Andy Panda doing battle with a garden weed. Title: The Wacky Weed.
A Yogi Bear cartoon from the 1960s featured a troop of boy scouts camping at Jellystone Park, and Yogi scheming to get them to "share" their food with him. Ranger Smith sternly reprimands Yogi for this, saying, "Those boy scouts would never molest a bear, and I'm going to make sure that no bear molests them." "Molest" had a meaning closer to "harass" or "upset" back then, but nowadays that line just comes out wrong, and the whole boy scout thing makes it even wronger.
Anyone who does attempt that kind of a thing with a bear probably deserves whatever they get.
Similarly, the 1942 Porky Pig/Daffy Duck short My Favorite Duck has a scene where Daffy points out a sign reading: "Season closed - No duck shooting - Don't even molest a duck".
The Polish translator went with the word "molestowac", which means exclusively "to sexually harass" in modern Polish. Apparently, the translator missed somethingthere. Also, the translator omitted the word "even", which quite clearly points to the fact that "molests" means something mild in this context.
Also, from Yogi's Gang (a sort of team-up of all the Hanna Barbera talking animals up to that point) theme song, "If those big goons were out of the way / the world would be so bright and gay".
An episode of X-Men: Evolution has Juggernaut boasting that he's raw power. Cyclops responds, "You want it raw, tough guy? Then take it raw!" before ripping off his protective barrier. 'Raw' is becoming more and more recognized as a term for condomless sex.
Gang banger is still used as a term for someone in a gang, meaning that this is simply an unintentional Double Entendre. In the future, however, examples may well turn into this.
In modern parlance "gangbanger" pretty much always means "someone in a street gang", while "gang bang" pretty much always means "group sex". Some derivatives (such as "gangbanging") could go either way, though it's usually pretty clear from context which is meant.
Remember the 'making love' explanation earlier? Does explain how Pepe Le Pew got away with saying he'd love to do this all night and all day with an obviously non-consenting non-skunk he happened to grab without everyone and their senator screaming to bleach out the soundtrack.
Speaking of the changing meaning of 'making love', a Jem song ("Who Is He Kissing?") featured the line "who is he kissing/is it me?/or is he making love to a fantasy?"
A Fractured Fairy Tales segment had the Big Bad Wolf as a lazy cad, reading a popular upscale girlie mag with the slightly altered title "Gay Boy".
In the British cartoon King Arthur's Disasters Lancelot's catchphrase when something happens that he doesn't like is "Oh Blow!"
The 1936 Felix the Cat cartoon "Bold King Cole" had Felix singing this lyric.
''We laugh and play, it keeps us gay".
Similar to the SpongeBob example, one of the lyrics in the song "What's This?" from The Nightmare Before Christmas has "In here, they've got a little tree! How queer!"
Matthew Pocket: Oh, what a gay time we shall have, and I do mean gay as in festive, not as in penetration of the bum.
Also lampshaded: "Chef's Chocolate Salty Balls", which Eric Cartman likes to eat.
"Rainforest Schmainforest" put all three definitions of "gay" to use in various ways. The Getting Gay With Kids choir is all about children spreading cheer and not at all about going pederastic, though one jungle geurilla does rather indignantly declare that "I'm not getting gay with any kids!" Then too, the Getting Gay With Kids choir's original theme is indeed as "totally gay" as it claims to be. (Their revised theme at the end, however, wasn't so gay in any sense of the word.)
In Snow White and the Seven Dwarfs, Doc, who's prone to Spoonerisms, asks "What are you and who are you doing?" It was meant to just be a nonsense phrase, but now it sounds like he's asking Snow White who she has sex with.
Sky Dancers had an episode where one of the main characters had choreographed a new dance, and her companions urged her to demonstrate at a public event. Cue cries of "We want The 'D'! Show us The 'D'!"
The 1954 black and white Frosty the Snowman short has a line "Happy and gay was he". It still airs on TV occasionally.
Played for laughs with Mr. Burns (who, according to the show's ever-shifting canon, came of age sometime between the turn of the twentieth century and the Roaring Twenties) is apparently completely unaware of the latter-day definition of the word "gay". On one occasion, on a shock-jock radio show, he recalls his father taking him to a picnic when he was a child, saying "That certainly was a gay experience. I ate my share of wieners that day!"
Mr. Burns asks Smithers what he did this weekend, "Something gay, no doubt." Smithers is momentarily taken aback, but Burns continues, "You know, light-hearted, fancy free, mothers, lock up your daughters, Smithers is on the town!" Smithers is visibly relieved.
Smithers is set on fire, and runs by Mr. Burns, who is watering the lawn. Screaming, "Help me, Mr. Burns! I'm flaming!". Cue an Aside Glance that shatters the Fourth Wall.
Burns (to Homer): "You're much more fun than Smithers. He doesn't even know the meaning of the word gay!" (Cue Gilligan Cut that demonstrates that, yeah, he kinda does.)
The season 22 episode "Flaming Moe" (not The One WithAerosmithnote That one was called "Flaming Moe 's") turns this up to eleven; one of Smithers' "friends" comments upon meeting Burns that he didn't know Smithers was into "lemon parties"note VERY not safe for work, look it up yourself— or, better yet, don't, and Burns obliviously insists that he gets "first squeeze".
Another Martin Prince example had him refer to a humanoid skeleton as "one of the major Homos." Bart was about to let Martin have it for that one, but Lisa stopped him.
Kent Brockman thanking New Springfield for making them rich "From now on, we'll be taking golden showers!" Which is followed by off-screen laughter from the crew as Brockman asks "What?!"
Unlike when it was aired, "The Telltale Head" may make your kids giggle with Homer's line: "You know, Bart, when I was your age, I pulled a few boners."
The Simpson innuendo for the ages, with a bit of Hypocritical Humor on Ned Flanders's part: "Homer, all of us pull a few boners now and then, go off half-cocked, make asses of ourselves. So I'm not trying to be hard on you, but I just wish you wouldn't curse in front of my boys."
In a storyline in Spider-Man the Animated Series, Peter is bemused at the idea of a WWII-era hero in a yellow costume called The Whizzer - because of his speed. At Omar Mosely explains, it was a different time.
In Archer, episode "Double Deuce", it's already been established that Woodhouse is attracted to Reggie Thistleton. Both characters are British and fighting in The Great War when this happens:
Woodhouse: I'm a — Reggie: Fag? Woodhouse: Excuse me, sir? Reggie: Have you got one? Dying for a smoke.